Chalk line housing



FIG. 1 is a front, right side and top perspective view of our design fora chalk line housing;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof;

The portions of the chalk line housing shown in dotted lines do notconstitute a part of the claimed design.

The ornamental design for a chalk line housing, as shown and described.